Apple iPhone 5c - 16GB – Support Forum

It seems that the lasy iphone I bought from here wasn't unlocked, it was "sime free". This means it lockes itself to the first sim you insert.

By inserting a talkmobile sime, the phone became locked to their network. I now can't get anyon - Apple, Talkmobile or vodefone (the host network) to unlock it. All talkmobile cam suggest is that i get someone to jailbreak the phone.